Isn't comparable to the mobile app in terms of features. Doesn't sync tree notes automatically, doesn't have a functioning timer, doesn't have a 5 minute rest period, doesn't show all trees planted(only in the browser session) Doesn't save if you exit the browser without syncing. And many many more.

Edit: Now with the recent update, notifications no longer work, so you don't know if the timer has ended.

Edit 2: Now sync doesn't work. USELESS, might as well set a Google timer since it core functionality works better then this extension as of now.

great app love the synch across my devices but my major complain while using the firefox addon is that here is very little sound when the alarm comes off after my study session and break. I am unknowingly not tracing my progress without a proper notification. please update the addon to include customized alarms or volume.